published on: 2013-12-17 00:25:44
cineraria: ピタゴラスイッチ
matiasywea.tumblr.com/post/70238627369/
matiasywea.tumblr.com/post/70240447869/
feelripe: John William Waterhouse - Diogenes - 1882
matiasywea.tumblr.com/post/70255496935/
hydrogeneportfolio: Minimal Posters - Five Great Mathematicians And